Pipe-wrench.



No. 773,958. PATENTED NOV. 1, 1904. B. MEGZYNSKI.

PIPE WRENCH.

APPLICATION FILED MAY 16. 190 1.

N0 MODEL.

Patented November 1, 1904.

PATENT EETcE.

BOLESTAWS MECZYNSKI, OF CHICAGO, ILLINOIS.

PIPE-WRENCH.

SPECIFICATION forming part of Letters Patent No. 773,958, dated November 1, 1904.

Application filed May 16, 1904x To all whmn it natty concern:

Be it known that I, BOLESTAWS MECZYNSKI, a subject of the Czar of Russia, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Piperenches, of which the following is a specification.

This invention relates to that class of wrenches commonly known as pipewrenches, and has for its object the production of a wrench which combines simplicity, durability, and ease and effectiveness of operation to the highest degree.

The wrench of this invention is so constructed that it may be quickly and readily applied to pipes of all sizes with but slight adjustment and when so applied will firmly grip or bite into the pipe and when turned will exert a leverage which will tend to prevent the pipe from slipping, and at the same time the wrench is so constructed that it may be drawn back for succeeding turns without difficulty.

The invention consists in the features of construction and combination of parts hereinafter described and claimed.

In the drawings illustrating the invention, Figure 1 is a side elevation of the wrench in open position for application to a pipe; Fig. 2, a similar view showing the wrench in position to turn the pipe; Fig. 3, a rear edge view of the wrench, and Fig. 4: an enlarged detail of the adjustable gripping-head.

The wrench is constructed to have a straight shank A, provided at its outer end with a handle B and provided at its forward or acting end with screw-threads b to enable the shank to be adjusted with respect to the jaws, and at the end of the screw-threaded portion of the shank is a gripping-head C, tapered at its forward end and provided with a series of forwardly-projecting teeth 0 and at its outer end with end -teeth or studs 0. (Best shown in Fig. 4:.) The shank. head, and handle may be formed integral of a single piece of metal, if so desired, or may be fitted one' into the other in any usual and well-known way.

Screw-threaded onto the shank is a rounded adjusting-nut D, provided on its opposite $erial No. 208,322. (No model.)

l sides with outwardly-projecting studs or trunnions (Z for the securing of the jaws hereinafter described. The jaws, which are adapted to cooperate with the gripping-head, consist of a metal bar E, having at its attaching end a pair of distended arms 0, each terminating in a socket e, which sockets are pivotally mounted on the studs or trunnions heretofore described, which allows the jaw member to rock or oscillate with respect to the shank. The jaw member consists of a straight bodysection F and a rearwardly-bent section G, formed integral with the body-section and bent to form an oblique angle therewith, the body-section being provided with inwardlyprojecting teeth f and the end section provided with outwardly-projecting teeth g. At the angle between the two sections are teeth g, which arrangement provides the entire jaw member with teeth on its acting face.

In operation the shank and handle are held as in Fig. 1, allowing the jaw member to swing down by gravity into the position shown in the drawing to open the space between the jaws and the biting head for the adjustment of the wrench onto a pipe. After the wrench has been adjusted into place the handle is drawn back to throw up the jaw-section into the position shown in Fig. 2, and the handle is then sufficiently turned or adjusted to bring the biting head into contact with the pipe, in which position the pipe will be firmly held by the teeth of the two jaws and the head. As

nary way the inwardly-projecting teeth 7 and the teeth 00f the adjusting-head will bite into the pipe or other article, and the greater the pressure exerted on the handle to turn the pipe the greater will be the impingement of the teeth. When pressure is released from the handle. the teeth will be disengaged, and the handle may be swung back into the initial position for succeeding turns. Under some circumstances it may be impossible to entirely reverse the wrench in order to turn the pipe in the opposite direction; but such reverse turning may be effected in the following manner, if necessary: By screwing up the adjusting-head until the studs or teeth 0 l engage with the outwardly-projecting teeth the handle is turned forwardly in the ordithe pipe will be clamped in the triangle formed by the several sections of the wrench and may be rearwardly turned, and during such turning the outwardly-projecting teeth g, rather than the inwardly-projecting teeth f, will bite into the metal of the pipe during the turning operation. By providing teeth which in both instances extend back from the angle g of the jaw members one or the other of the sets of teeth will always be adapted to grip the pipe, so that the use of the wrench is increased and its field of operation extended. Further merit lies in the fact that the inner and outer sections o1 the jaw member form an acute angle with one another, which enables objects of varying size to be handled by the wrench, which can be used for the purpose of turning bolts, nuts, and other objects in the same way that it is used for the purpose of adjusting pipe.

What I regard as new, and desire to secure by Letters Patent, is

In a wrench, the combination of a shank screw-threaded on its acting end and provided on its opposite end with a handle, a tapered head on the acting end of the shank provided with a series of forwardly-projecting teeth on its sides and forwardly-projecting teeth or studs on its end, a nut screw-tlweaded on the shank and provided with outwardly-projecting trunnions, a jaw member provided with arms pivoted to the trunnions, said jaw member consisting of a body-section provided with inwardly-extending teeth, said body-section terminating in an end section formed integral with the body-section and at an acute angle therewith, and provided with teeth projecting outwardly toward the free end of the end section for allowing objects of varying size to be held between the teeth and for permitting the objects to be engaged by the teeth of one of the jaw members when moved in one direction and the other of the jaw members when moved in the other direction, and for permitting the tapered head to be projected to have its forwardly-projecting teeth engage the teeth of the outer section of the jaw member, substantially as described.

BOLESTAVVS MECZYNSKI. Witnesses:

JAcoB LnvY, SAMUEL W. BANNING. 

